Seasonal Highlights
Climate in
During Autumn
2008 (September~November), mean surface
air temperatures were at least
For the season, Precipitations were observed at least 30~100% more
than normal in most Northwest China, central-western and locations in eastern
Inner Mongolia, central-northern North China, eastern and parts of southwestern
Tibet, western Jiangnan, western South China and
Hainan Province, with over 200% above normal in locations. Meanwhile,
precipitations were observed 30~80% below normal in locations of northern
Xinjiang, most central and western Tibet, parts of eastern Inner Mongolia,
southeastern Northeast China, Huanghai, Jianghuai, with no precipitation in locations of
southwestern Xinjiang and most central-western Tibet.
Climate in the World
During Autumn 2008, seasonal mean surface air temperatures were
warmer than normal in most of the world. Mean surface air temperatures were
observed at least
For the
season, precipitations were observed at least 30% more than normal in most
southeastern Russia, central Central Asia, southern
Mongolia, most Northwest, parts of northern and southeastern China, Indo-China
Peninsula, northeastern South Asia, southern West Asia, parts of western and
eastern Africa, central and parts of northern North America, locations in
northern South America and most Australia, with over 100% above normal in
locations. Meanwhile, precipitations were observed 30~80% below normal in
locations of central-northern Russia, northern Mongolia, central-eastern West
Asia, central South Asia, locations in Central Asia, most central and eastern
North Africa, locations in northern and western North America, locations in
South America and locations in Australia, with no precipitation in locations.
General Circulation Features
Northern
Hemisphere: During Autumn 2008, in the 500hPa geopotential height anomaly
field, positive anomalies above 4 dam covered regions from southeastern Europe
to northwestern Central Asia, regions from the northeastern Pacific Ocean to
western North America, regions from northeastern North America to the northern
North Atlantic Ocean, with central values above 8 dam over
locations. Meanwhile, negative anomalies below -4 dam covered locations in
northwestern North Africa and locations in southern
Southern
Hemisphere: For the season, zonal circulation prevailed at the mid-high
latitudes. In the 500hPa geopotential height anomaly field, positive anomalies
above 4 dam covered the vicinity of 60oS and most regions south to
it, the central and locations in the southeastern